Swans

species: 
Mute Swan
scientific name: 
Cygnus olor
notes: 

Yellow neckband with a black four alpha-numeric code : "nnPx", where n is a number and x is a letter.

note 1 :

 

email sighting submit: 
email sighting submit (2): 
colour-ring type: 
Neckband.
colour-ring colour (of the c-ring): 
Yellow [Y]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Croatia.